EP 2862976 B1 20161019 - Apparatus and method for closed-loop control of creped tissue paper structure
Title (en)
Apparatus and method for closed-loop control of creped tissue paper structure
Title (de)
Vorrichtung und Verfahren für geschlossene Schleifensteuerung von gekreppter Tissuepapierstruktur
Title (fr)
Appareil et procédé de commande en boucle fermée de structure de papier mousseline crêpé
Publication
Application
Priority
- US 201361892252 P 20131017
- US 201414225703 A 20140326
Abstract (en)
[origin: EP2862976A1] A method includes obtaining (1004) measurements associated with one or more controlled variables related to a structure of creped tissue paper (254) during production of the creped tissue paper. The method also includes generating (1008) at least one control signal that adjusts one or more manipulated variables associated with the production of the creped tissue paper in order to alter the structure of the creped tissue paper. The one or more controlled variables include a number of folds per unit length of the creped tissue paper, a caliper of the creped tissue paper, a macro crepe of the creped tissue paper, and/or a micro crepe of the creped tissue paper. The manipulated variable(s) could include a crepe percentage, a creping blade angle, a flow of sizing agent, and/or a cross direction (CD) profile of nozzle positions associated with a spray boom (116) that sprays sizing agent onto a Yankee dryer (110).
IPC 8 full level
D21F 7/06 (2006.01); D21F 11/14 (2006.01); D21G 9/00 (2006.01)
CPC (source: EP US)
D21F 7/06 (2013.01 - US); D21F 11/14 (2013.01 - EP US); D21G 9/0036 (2013.01 - EP US); D21G 9/0045 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2862976 A1 20150422; EP 2862976 B1 20161019; CA 2864777 A1 20150417; US 2015107791 A1 20150423; US 9238889 B2 20160119
DOCDB simple family (application)
EP 14185565 A 20140919; CA 2864777 A 20140922; US 201414225703 A 20140326